Grain door



Sept'. 29, 1925.

H. E. ROLLASN GRAIN DOOR Filed Dec. 9, 1922 Patented Sept. 29, 1925.

PATENT FFIC.

HAROLD ERNEST ROLLASON, 0F TROCHU, ALBERTA, CANADA.

GRAIN DOOR.

Application filed December 9, 1922. Serial No. 605,969.

T0 all whom t may concern.

Be it known that 1, HAROLD Fn-Nrs'r RoL- rasoir7 a subject ot the .King of Great Britain, and resident ot Trochin in the Frovince of Alberta. Dominion ot Canada, have invented certain new and useful Improvements in Grain Doors, et which the following is a speciiication.

rEhe primary purpose of the invention is to provide a door for grain, fruit, and other cars which is capable oi being moved from a position at one side ot the door opening to a position within or opposite said opening and which, in the lat er position, may be permitted to collapse under the pressure ot the car contents to permit escape ot the aout making it necessary to shift the door lroin its position within or opposite the door opening.

Another purpose ot the invention is to provide a door of the type mentioned, composed or hingedly related sections normally held in alignment across the door opening but adapted, when the holding means is re leased, to told or collapse in a manner permitting escape of the car contents without necessitating detachment of the door from the car.

A still further purpose of the invention is to provide improved means supporting the door for travelling movement to permit bodily movement ot the door from a position at one side ot the door opening to a position within or opposite said opening.

Other purposes and advantages ot the invention not speciically stated above will become apparent from the tollowing description and accompanying drawings, in which Figure 1 is a view in side elevation of my invention as applied to the inner side ot a car wall having the usual door opening.

Figure 2 is a vertical sectional view taken along the line 2 2 of Figure 1.

Figure 3 is a fragmentary View in side elevation showing the outside appearance of my improved door when secured in a position closing the door opening in the car wall.

Figure 4 is a sectional view along the line 4 4 of Figure 1, but showing the door as it will appear when in open or folded position.

Figure 5 is a fragmentary detail view.

Referring more particularly to the drawings7 5 designates a car body which is provided with the usual door opening 6. Angle irons 7 and 8 are secured to the car wall on opposite sides of the opening 6 to aii'ord grooves 9 and 1U adapted to receive therein tire tree longitudinal edges et' the door which is designated as a whole by the numeral 11.

rthe door 11 is preferablyv composed oi a pair ofsections 12 and 18 having their adjacent edges hingedly connected as indicated at 14 and, preferably, formed for 'overlapping engagement to prevent leakage therebetween when the sections are aligned across the door opening as shown in F igure 1.

1n order to hold the door sections in alignment across the door opening, l provide the said sections with oppositely cing keepers 15 disposed to overlie the end portions ot a cross bar 16 which is pivoted to one of the sections as indicated at 17. This bar is normaily held in the position shown in Figure 8 by a spring latch 18 1out may be released and moved out oi engagement with the said keepers 15 to permit the door sections to fold or buckle outwardly to the open position shown in Figure 4. The latch 1S has its lower end enlarged as at 18 to engage beneath the bar 16 as indicated by dotted lines in Figure 3.

The door sections 12 and 13 are carried by suitable hangers 19 supported at their upper ends to move longitudinally along a track 20. Each hanger is preterably coinposed ot two swivelly connected parts comprising a vertical plate 21 having its lower end bent at right angles as indicated at 22 and apertured to receive therethrough the threaded shank of a screw 2? which is equipped above the portion 22 with a sup porting nut 24. The lower portion of the said screw is oset with respect to the threaded shank Aand terminates in a bifurcated portion 25 fitting over and secured to the upper edge of one of the door sections as shown to advantage in Figure 2. The upper end of the plate 21 is bent laterally and downwardly as indicated at 25 to support one end ot a spindle 26 carrying a grooved roller 27 the other end of said spindle being supported by the opposing body portion of the plate 21.

The rollers 27 of the two hangers 19 are movable along the upper rounded edge of the track 20 which is in the form of an elongated bar having its opposite end portions attached to the wall of the car by a slot and pin connection 28, the said ends bee t f Y w r.. the car vdoor whereby said door is treely I la raising' and lofierimgv movement 'acl' is eiti'ected through the medium i :am levers 29 pivoted to r i'vall and hating' their cani surface-s enl fina the offset ends ot the bar. ln lieu of this arrangement, however, it will be understood that sini'le cam lever may be positioned bel rf the intermediee portion ot the or any other sui ole means may be provided for accomphshing` the function et the said levers.

Assuming' the 'ofi to he arranged as shown by 'full li '.1' in Figures l and il, when it is desired to disci arge the nts et" the car the member i8 disen i 'from the cross har lf3 azul the lat rotated out o engagen'ient with the keepers l. The pressure of the car contents the door will now be effective buckle the door sections outwardly to the collapsed or folded position shown in 'iure 1i, thus permitting' the contents of the car to discharge tl'irouifh the door opening' without makingy it necessary to shift the door to one side oi' the opening' or to completely detach the door from the car as is usually requir d. lf it is desired to close the door after the discharging' operation, it is simply necessary to torce the door sections into alignment in such a manas to reengg'ae'e the tree longitudinal cdj'jes oi" the sections in the grooves 9 and l0, after which the bar i6 is again swung to a position underlying' the keepers l5 to hold the sections in aligned position. Assuming that it is desired to move the door trom the position shown in Figure to the pos indicate-r by dotted lines in Figure i, tno cam levers are operated to raise the track and thereby elevate tne lower edge o the door with respect to the car floor. The door s then tilted inwardly "teli clently to clear the an `jle irons 7 and il, after which the door sectie s may be flattened out or moved inte pesi ion et alignment and f e doei' shitted to the le'it on the track, the Ar being' then lowered by n'ioveinent of thA levers to position the lov-cer edge of the door en the car (lo whereby the weight of the door will l'e effective to hold a;'r-ainst i `fertent sl "enz-g' movement on the t ihile in the foregoing, l have described what l nonv consider' to be the preferred embodiment of iny invention, it is to be understood that l am not to be limited to the exact details, combination, and arrantfement et parts set t'orth herein, but ma resort to suchl modineati ns as may be desired providing ot coinse that the same come Within the spirit and scope of the appended claim.

What l elim is:

A. car door construction comprising' an overhead fuipportingy track from which a door is adapted to he suspended for sliding; movement, said track presenting` a body portion adapted to be spaced from the car Wall and offset end portions engageable with said y, pin and slot means for securing' the oi'set ends of the track to the Wall to permit bodily vertical movement of the track and cam levers7 vadapted to be mounted With the cam sri'"aces thereof engaging the offset ends ot the track to effect raising' or lowering movement ot the latter.

ln testimony whereof l hereunto affix my signature. 

